private void RemoveItem(object item)
{
TreeListView.Node node;
if (!m_dictNodes.TryGetValue(item, out node))
{
return;
}
m_dictNodes.Remove(item);
// Need to recursively remove all child nodes from the dictionary
if (node.HasChildren)
{
foreach (TreeListView.Node child in GatherNodes(node.Nodes))
{
if (m_dictNodes.ContainsKey(child.Tag))
{
m_dictNodes.Remove(child.Tag);
}
}
}
TreeListView.NodeCollection collection =
node.Parent != null
? node.Parent.Nodes
: m_treeListView.Nodes;
if (collection.IsReadOnly)
{
return;
}
collection.Remove(node);
}
private void AddItem(object item, object parent)
{
if (m_dictNodes.ContainsKey(item))
{
return;
}
TreeListView.Node nodeParent = null;
if (parent != null)
{
m_dictNodes.TryGetValue(parent, out nodeParent);
}
TreeListView.Node node =
CreateNodeForObject(
item,
m_itemView,
m_treeListView.ImageList,
m_treeListView.StateImageList,
m_dictNodes);
bool expand = nodeParent != null && m_ExpandWhenNewChildAdded;
m_dictNodes.Add(item, node);
// Recursively add any children
AddChildrenToItemRecursively(
item,
node,
m_view,
m_itemView,
m_treeListView.ImageList,
m_treeListView.StateImageList,
m_dictNodes);
TreeListView.NodeCollection collection =
nodeParent == null
? m_treeListView.Nodes
: nodeParent.Nodes;
// Make sure collection can support having children
if (collection.IsReadOnly && (collection.Owner != null))
{
collection.Owner.IsLeaf = false;
}
if (collection.IsReadOnly)
{
return;
}
// Add to tree
collection.Add(node);
if (expand)
{
nodeParent.Expanded = true;
}
}